1985 Honda ATC250r big bore 310r D u0026A Restorations baddest around

85 86 250r Atc Trx Honda Port Esr 310 Cylinder Jug Head Piston 1985 1986 Atc250r. SHOULD BE BORED TO NEXT SIZE UP. Cylinder HAS BEEN FULLY PORTED. RAN GOOD BUT THE PISTON AND CYLINDER WALLS ARE SHOWING SOME WEAR (PICTURED).